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Table of Contents

NAD M12 - Smart Power Follow

Overview
Features
How it Works
Active Media Players
Turning the NAD M12 On

Example

Turning the NAD M12 Off

Example

Multiple Media Players
Blueprint Inputs
Recommended Settings
Example: Typical Operation

Starting playback
Switching between sources
Stopping all playback

Requirements
NAD M12 Home Assistant Configuration

Configuration
Network Standby
IP Address
Restart Home Assistant
Verify the Entity

Installation

Automatic Installation
Manual Installation

Troubleshooting

NAD M12 does not turn on
NAD M12 does not turn off
NAD turns off too quickly
NAD turns on too quickly

Notes
Changelog

v1.0

NAD M12 - Smart Power Follow

Overview

This Home Assistant Blueprint provides automatic power control for a NAD M12 amplifier based on the state of one or more media players.

The blueprint turns the NAD amplifier on when at least one selected media player becomes active.

The amplifier is only turned off when all selected media players are switched off or have an unavailable/unknown state.

This makes the NAD M12 follow the activity of connected media players automatically.

Features

🎵 Monitors one or more Home Assistant media players
🔌 Automatically turns the NAD M12 on when a media player becomes active
⏱️ Configurable delay before turning the amplifier on
📴 Automatically turns the NAD M12 off when all media players are inactive
⏱️ Configurable delay before turning the amplifier off
🔄 Re-checks media player states before powering off
💡 Supports multiple media players
⚙️ Fully configurable through the Home Assistant Blueprint UI

How it Works

The blueprint monitors all selected media players.

When any monitored media player changes state, the blueprint checks whether at least one of them is active.

The logic is:

Media Player State Change
         │
         ▼
    Check all players
         │
    ┌────┴────┐
    │         │
  Active    All OFF
    │         │
    ▼         ▼
 Wait ON   Wait OFF
  delay      delay
    │         │
    ▼         ▼
 NAD ON   Re-check players
              │
         ┌────┴────┐
         │         │
      Active     All OFF
         │         │
         ▼         ▼
      No action  NAD OFF

Active Media Players

A media player is considered active when its state is anything other than:

off
unknown
unavailable

This means that states such as the following are considered active:

playing
paused
idle
buffering

The blueprint therefore does not require a specific playing state.

Instead, it treats every available state other than off, unknown and unavailable as active.

Turning the NAD M12 On

When at least one selected media player is active, the blueprint turns on the NAD M12.

Example:

Media Player 1: playing
Media Player 2: off
Media Player 3: off

Result:

NAD M12 → ON

If a power-on delay is configured, the blueprint waits before turning on the amplifier.

Example

Power On Delay: 5 seconds

The sequence becomes:

Media player becomes active
        │
        ▼
   Wait 5 seconds
        │
        ▼
     NAD M12 ON

Turning the NAD M12 Off

The NAD M12 is only turned off when all selected media players are inactive.

Example:

Media Player 1: off
Media Player 2: off
Media Player 3: off

Result:

NAD M12 → OFF

If a power-off delay is configured, the blueprint waits before switching off the amplifier.

Example

Power Off Delay: 30 seconds

The sequence becomes:

All media players OFF
        │
        ▼
   Wait 30 seconds
        │
        ▼
   Re-check players
        │
        ▼
   Still all OFF?
     │       │
    YES      NO
     │        │
     ▼        ▼
  NAD OFF   No action

The second check is important because another media player may become active during the delay.

Multiple Media Players

The blueprint supports multiple media players.

For example:

Apple TV
Chromecast
Spotify
Home Assistant Media Player

If any one of these is active, the NAD M12 remains powered on.

Example:

Apple TV:     playing
Chromecast:   off
Spotify:      off

→ NAD M12 ON

If the Apple TV is then switched off but Spotify is still active:

Apple TV:     off
Chromecast:   off
Spotify:      playing

→ NAD M12 remains ON

Only when all selected media players are inactive will the NAD M12 be switched off.

Blueprint Inputs

Input	Description	Default
Media Players	Media players that can control the NAD M12	—
NAD M12	Media player entity representing the amplifier	—
Power On Delay	Delay before turning the amplifier on	0 s
Power Off Delay	Delay before turning the amplifier off	30 s

Recommended Settings

A typical configuration could be:

Power On Delay: 0 seconds
Power Off Delay: 30 seconds

This provides immediate amplifier activation while preventing the NAD from switching off immediately when a media player briefly changes state.

For systems where media players need time to stabilize:

Power On Delay: 5 seconds
Power Off Delay: 60 seconds

Example: Typical Operation

Starting playback

Media Player: playing
        │
        ▼
    NAD M12 ON

Switching between sources

Apple TV: playing
Spotify: off
        │
        ▼
Apple TV: off
Spotify: playing
        │
        ▼
NAD M12 remains ON

Stopping all playback

Apple TV: off
Spotify: off
Chromecast: off
        │
        ▼
   Wait 30 seconds
        │
        ▼
   Re-check players
        │
        ▼
   NAD M12 OFF

Requirements

Home Assistant
One or more media_player entities
A media_player entity representing the NAD M12
The NAD M12 must support media_player.turn_on and media_player.turn_off
The NAD M12 must be set to Network Standby

NAD M12 Home Assistant Configuration

The NAD M12 is configured in Home Assistant using the NAD media player integration.

Add the following configuration to your configuration.yaml:

media_player:
  - platform: nad
    type: Telnet
    host: 192.168.0.79
    port: 23
    name: NAD M12
    max_volume: -40
    sources:
      1: "TV"

Configuration

Setting	Value	Description
Platform	`nad`	Uses the NAD integration
Type	`Telnet`	Communication with the NAD M12
Host	`192.168.0.79`	IP address of the NAD M12
Port	`23`	Telnet communication port
Name	`NAD M12`	Name of the Home Assistant media player
Max Volume	`-40`	Maximum volume exposed to Home Assistant
Source 1	`TV`	Configured input source

Network Standby

The NAD M12 must have Network Standby enabled.

This is required so that Home Assistant can communicate with the amplifier and power it on when a selected media player becomes active.

If Network Standby is disabled, the NAD M12 may not respond to the power-on command while it is in standby.

IP Address

The IP address in the example is:

192.168.0.79

This must be changed if your NAD M12 uses a different IP address.

If the NAD M12 receives its IP address through DHCP, it is recommended to create a DHCP reservation for the amplifier in your router so that the IP address does not change.

Restart Home Assistant

After adding or changing the configuration, restart Home Assistant.

Go to:

Settings → System → Restart Home Assistant

After restarting, the NAD M12 should be available as a media_player entity.

Verify the Entity

The configured name is:

NAD M12

Depending on the Home Assistant entity naming, the resulting entity will typically be:

media_player.nad_m12

This entity should be selected as the NAD M12 in the NAD M12 - Smart Power Follow Blueprint.

Installation

The easiest way to install this Blueprint is to use the Import Blueprint button below.

Automatic Installation

Click Import Blueprint below.
Home Assistant will open the Blueprint import page.
Select Import Blueprint.
Once imported, the Blueprint will be available under:
```
Settings → Automations & Scenes → Blueprints
```
Create a new automation from the Blueprint.
Select the media players that should control the NAD M12.
Select the NAD M12 media player entity.
Configure the desired power-on and power-off delays.
Save the automation.

Manual Installation

If the automatic import does not work, the Blueprint can also be installed manually.

Open the Blueprint YAML file in the repository.
Copy the complete YAML content.

In Home Assistant, go to:

Settings → Automations & Scenes → Blueprints

Select Import Blueprint.
Paste the URL of the raw YAML file.
Confirm the import.
Create a new automation from the Blueprint.
Configure the media players, NAD M12 and delays.

Troubleshooting

NAD M12 does not turn on

Check that:

The NAD M12 has Network Standby enabled.
The selected NAD entity is a media_player.
The IP address in configuration.yaml is correct.
Home Assistant can communicate with the NAD M12.
Home Assistant can execute:
```
media_player.turn_on
```

NAD M12 does not turn off

Check that all selected media players actually transition to:

off

The blueprint also treats:

unknown
unavailable

as inactive states.

If the NAD does not turn off, check whether one of the selected media players remains in another active state such as:

idle
paused
playing

These states are considered active by the blueprint.

NAD turns off too quickly

Increase the Power Off Delay.

For example:

Power Off Delay: 60 seconds

The blueprint will wait 60 seconds and then check all media players again before switching off the amplifier.

NAD turns on too quickly

Increase the Power On Delay.

For example:

Power On Delay: 5 seconds

Notes

The automation uses mode: restart.

This is important because a new media player state change restarts the automation while a power-on or power-off delay is in progress.

This allows the latest media player state to determine whether the NAD M12 should ultimately remain on or be switched off.

Changelog

v1.0

Initial release
Support for multiple media players
Automatic NAD M12 power-on
Automatic NAD M12 power-off
Configurable power-on delay
Configurable power-off delay
Re-check of media player states before power-off